Finding the Fourth Proportional to 52,776.86, 72,832.18 and 28,578.09

Step by Step Solution

1. Step 1: Write the proportion equation
   52,776.86 : 72,832.18 = 28,578.09 : x
2. Step 2: Convert to fraction form
   52,776.86/72,832.18 = 28,578.09/x
3. Step 3: Cross multiply
   52,776.86x = 72,832.18 × 28,578.09
4. Step 4: Simplify right side
   52,776.86x = 2,081,404,594.94
5. Step 5: Solve for x
   x = 2,081,404,594.94/52,776.86
6. Step 6: Final answer
   x = 39,437.83